AC calibration link and communication device

Abstract

The application discloses an AC calibration link and a communication device, the AC calibration link comprising: an AC transmitting link, the input end of which is connected with the transmitting link; the first switching end of the first switching device is connected with the output end of the AC transmitting link, and the common end of the first switching device is connected with the AC power dividing / combining network; and the input end of the AC receiving link is connected with the second switching end of the first switching device, and the output end of the AC receiving link is connected with the receiving link. According to the invention, the problems of high insertion loss and power consumption in an AC calibration link are solved.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an AC calibration link and communication equipment. Background Art

[0002] With the development of MIMO communication technology, the requirements for over-the-air synthesis quality are getting higher and higher. The calibration accuracy of the AC calibration link directly determines the quality of over-the-air synthesis. Therefore, the optimization of the AC calibration link of MIMO models is a topic that needs to be focused on. However, in related technologies, the insertion loss and power consumption of the AC calibration link are high, which is not conducive to the promotion and application of the AC calibration link. Summary of the invention

[0003] The main purpose of this application is to propose an AC calibration link and communication equipment, aiming to solve the problems of high insertion loss and power consumption in the AC calibration link.

[0004] To achieve the above objectives, the present application proposes an AC calibration link, the AC calibration link comprising:

[0005] An AC transmission link, wherein an input end of the AC transmission link is connected to the transmission link;

[0006] A first switching device, wherein a first switching end of the first switching device is connected to an output end of the AC transmission link, and a common end of the first switching device is connected to an AC power splitting / combining network;

[0007] An AC receiving link, wherein an input end of the AC receiving link is connected to the second switching end of the first switching device, and an output end of the AC receiving link is connected to a receiving link.

[0008] The present application also proposes a communication device, wherein the communication device comprises the AC calibration link as described above.

[0009] The AC transmitting link and the AC receiving link of the embodiment of the present application are both connected to the first switching device. When performing uplink AC calibration, the AC transmitting link is connected to the AC power splitter / combiner network through the first switching end; when performing downlink AC calibration, the AC power splitter / combiner network is connected to the AC receiving link through the second switching end. Compared with the need to use a switching device and a multi-stage power splitter / combiner module to achieve calibration, the insertion loss of the device is relatively large. The difference between the two-stage power splitter / combiner module is about 7dB. In the embodiment of the present application, only a switching device needs to be set, so that the insertion loss of the rear stage is reduced by about 7dB. Under the premise that the output power of the AC transmitting link and the AC receiving link is certain, the insertion loss requirements of the rear-stage AC coupler and the combining network can be reduced, the coupling degree requirements of the AC coupler are relaxed (corresponding to reducing the line loss of the power amplifier output), and the power consumption of the whole machine can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0011] Figure 1 This is a schematic diagram of the circuit structure of an embodiment of the AC calibration link of the present application;

[0012] Figure 2 This is a signal flow diagram of the AC calibration link in the application for uplink AC calibration;

[0013] Figure 3 This is the signal flow diagram of the AC calibration link in this application when performing downlink AC calibration.

[0014] Description of Figure Numbers:

[0015] Label name Label name 10 The first power splitter / combiner module 70 Coupler 20 AC Transmitter 80 Sequential transmitter 30 The first switching device 90 Sequence receiving device 40 AC power splitter / combiner network 100 The second switching device 50 The second power splitter / combiner module 110 The third switching device 60 AC Receiver

[0016] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0019] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0020] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0021] The present application proposes an AC calibration link.

[0022] Reference Figures 1 to 3 In one embodiment of the present application, the AC calibration link includes:

[0023] An AC transmission link, wherein an input end of the AC transmission link is connected to the transmission link;

[0024] A first switching device 30, wherein a first switching end of the first switching device 30 is connected to an output end of the AC transmission link, and a common end of the first switching device 30 is connected to an AC power splitting / combining network;

[0025] An AC receiving link, wherein the input end of the AC receiving link is connected to the second switching end of the first switching device 30 , and the output end of the AC receiving link is connected to the receiving link.

[0026] The first switching device 30 is used to connect the AC transmission link with the AC power splitter / combiner network through the first switching end in response to an uplink calibration instruction; and to connect the AC power splitter / combiner network with the AC receiving link through the second switching end in response to a downlink calibration instruction. The AC calibration link also includes an AC power splitter / combiner network 40 and a coupler 70, and the coupler 70 is used to couple the downlink calibration sequence sent by the transmission link to the AC power splitter / combiner network 40, or to send the uplink calibration sequence received by the AC power splitter / combiner network 40 to each of the receiving links.

[0027] When performing uplink AC calibration, the transmitting link is connected to the AC transmitting link, the first switching device 30 and the AC power splitter / combiner network 40 to form an uplink transmitting channel. The receiving link is connected to the coupler 70 to form an uplink receiving channel. During the uplink AC calibration process, the transmitting link sends an uplink calibration sequence, switches the calibration sequence to the AC transmitting link AC_Tx, switches to the AC power splitter / combiner network 40 through the first switching device 30, and the AC power splitter / combiner network 40 is coupled and connected to the coupler 70, thereby coupling the calibration sequence to each receiving link. In this way, the uplink calibration sequence received by the receiving link can be collected for data analysis, and the amplitude and phase difference between the uplink calibration sequence of different receiving links and the standard sequence can be calculated and calibrated. When performing uplink AC calibration, the AC transmitting link AC_Tx sends an AC sequence, the uplink channel is detected, and the amplitude and phase difference of different receiving channels is calculated and calibrated.

[0028] When performing downlink AC calibration, the transmitting link is connected to the coupler 70 to form a downlink transmitting channel. The coupler 70, the AC power splitter / combiner network 40, the first switching device 30, the AC receiving link and the receiving link are connected to form a downlink receiving channel. During the downlink AC calibration process, the transmitting link sends a downlink calibration sequence, which is coupled to the AC power splitter / combiner network 40 by the coupler 70, switched to the AC receiving link AC_Rx by the first switching device 30, and then processed by the AC receiving link 60 to output the receiving link. In this way, the downlink calibration sequence received by the receiving link can be collected for data analysis, and the amplitude and phase difference between the downlink calibration sequence of the transmitting link and the standard sequence can be calculated and calibrated. When performing downlink AC calibration, the downlink channel sends an AC sequence, the AC receiving link AC_Rx detects, and the amplitude and phase difference of different transmitting channels is calculated and calibrated.

[0029] The AC transmission link and AC receiving link of the embodiment of the present application are both connected to the first switching device 30. When performing uplink AC calibration, the AC transmission link is connected to the AC power splitter / combiner network through the first switching end; when performing downlink AC calibration, the AC power splitter / combiner network is connected to the AC receiving link through the second switching end. Compared with the need to use a switching device and a multi-stage power splitter / combiner module to achieve calibration, resulting in a larger device insertion loss. For example, the difference between the two-stage power splitter / combiner module is about 7dB. The present application only needs to set a switching device, so that the rear-stage insertion loss is reduced by about 7dB. Under the premise that the output power of the AC transmission link and the AC receiving link is certain, the insertion loss requirements of the rear-stage AC coupler 70 and the combining network can be reduced, the coupling degree requirements of the AC coupler 70 are relaxed (corresponding to reducing the line loss of the power amplifier output), and the power consumption of the whole machine can also be reduced.

[0030] In one embodiment, the AC transmission link includes a first power division / combining module 10 and an AC transmission device 20, wherein the input end of the first power division / combining module 10 is connected to the transmission link, and the first power division / combining module 10 is used to receive an uplink calibration sequence sent by the transmission link and send the uplink calibration sequence; the input end of the AC transmission device 20 is connected to the output end of the first power division / combining module 10, and the AC transmission device 20 is used to process the uplink calibration sequence and send the processed uplink calibration sequence to the first switching device 30.

[0031] The AC receiving link includes a second power splitter / combiner module 50 and an AC receiving device 60. The input end of the AC receiving device 60 is connected to the first switching device 30. The AC receiving device 60 receives the downlink calibration sequence output by the first switching device 30 and processes the downlink calibration sequence. The downlink calibration sequence is sent to the first switching device 30 by the AC power splitter / combiner network 40. The input end of the second power splitter / combiner module 50 is connected to the output end of the AC receiving device 60. The output end of the second power splitter / combiner module 50 is connected to the receiving link. The second power splitter / combiner module 50 is used to receive the downlink calibration sequence processed by the AC receiving device 60 and send the downlink calibration sequence to the receiving link.

[0032] In this embodiment, the AC calibration link also has a transmitting link and a receiving link. The number of transmitting links and receiving links can be selected to be multiple, for example, it can be set to 16 channels, 32 channels, 64 channels, etc. The transmitting link is used to send the uplink calibration sequence and the downlink calibration sequence, and the receiving link is used to receive the uplink calibration sequence and the downlink calibration sequence. The AC transmitting device 20 and the AC receiving device 60 can perform radio frequency signal processing such as signal amplification / attenuation / filtering on the uplink calibration sequence and the downlink calibration sequence. The first power splitter / combiner module 10 and the second power splitter / combiner module 50 can divide the signal energy of an uplink calibration sequence into multiple channels and output them to each receiving link, and can also combine the signal energy of multiple downlink calibration sequences into one channel and output it to any one of the multiple receiving links.

[0033] Reference Figure 2 , Figure 2The signal flow diagram of the AC calibration link during the uplink AC calibration, wherein the direction indicated by the dotted arrow is the signal flow direction. When performing the uplink AC calibration, any one of the multiple transmission links is connected to the first power splitter / combiner module 10, the AC transmitter 20, the first switching device 30, the AC power splitter / combiner network 40 and the coupler 70 to form an uplink transmission channel. Each of the multiple receiving links is respectively connected to a coupler 70 to form an uplink receiving channel. During the uplink AC calibration process, the transmission link sends an uplink calibration sequence, and the calibration sequence is switched to the AC transmission link AC_Tx, which is processed by the first power splitter / combiner module 10 and the AC transmitter 20, and then switched to the AC power splitter / combiner network 40 through the first switching device 30. The AC power splitter / combiner network 40 is coupled to each coupler 70, thereby coupling the calibration sequence to each receiving link. In this way, the uplink calibration sequence received by the receiving channel can be collected for data analysis, and the amplitude and phase differences between the uplink calibration sequences of different receiving channels and the standard sequences can be calculated and calibrated. When performing uplink AC calibration, the AC transmission link AC_Tx sends the AC sequence, the uplink channel detects, and the amplitude and phase differences of different receiving channels are calculated and calibrated.

[0034] Reference Figure 3 , Figure 3 : is a signal flow diagram of the AC calibration link when performing downlink AC calibration, wherein the direction indicated by the dotted arrow is the flow direction of the signal. When performing downlink AC calibration, each transmission link in the multiple transmission links is connected to a coupler 70 to form a downlink transmission channel. The coupler 70, the AC power splitter / combiner network 40, the first switching device 30, the AC receiving device 60, and the second power splitter / combiner module 50 are connected to any receiving channel in the multiple receiving links to form a downlink receiving channel. In the process of downlink AC calibration, each transmission link sends a downlink calibration sequence, and multiple groups of downlink calibration sequences are respectively coupled to the AC power splitter / combiner network 40 through the coupler 70, switched to the AC receiving link AC_Rx through the first switching device 30, and then processed by the AC receiving device 60, and transmitted to the receiving link through the second power splitter / combiner module 50. In this way, the downlink calibration sequence received by the receiving channel can be collected and analyzed, and the amplitude and phase difference between the downlink calibration sequence of different transmission channels and the standard sequence can be calculated and calibrated. When performing downlink AC calibration, the downlink channel sends an AC sequence, the AC receiving link AC_Rx detects, calculates the amplitude and phase differences of different sending channels, and calibrates.

[0035] The output ends of the multi-channel transmission links of the embodiment of the present application are all connected to the first power / combining module 10. When performing uplink AC calibration, any one of the multi-channel transmission links can output the uplink calibration sequence to the AC transmitting device 20 through the first power splitter / combining module 10. The present embodiment also connects the input end of the multi-channel receiving link to the second power / combining module. When performing downlink AC calibration, each receiving link in the multi-channel receiving link can receive the downlink calibration sequence output by the AC receiving device 60 through the second power splitter / combining module 50. The present application can realize that the AC link is first combined by the first power splitter / combining module 10 and the second power splitter / combining module 50 before the AC transmitting device 20 / AC receiving device 60, and then switched by the first switching device 30. Under the premise that the output power of the AC transmitting device 20 is certain, the insertion loss requirements of the subsequent AC coupler 70 and the power splitter / combining network can be reduced, the coupling degree requirements of the AC coupler 70 are relaxed (corresponding to reducing the line loss of the power amplifier output), and the power consumption of the whole machine can also be reduced. Compared with the need to use a switching device and a multi-stage power splitter / combiner module to achieve calibration, which results in a large device insertion loss. For example, the difference between the two-stage power splitter / combiner module is about 7dB. The present application only needs to set a switching device, so that the latter insertion loss is reduced by about 7dB. The present application reduces the AC link cost and the number of AC link RF devices used by multiplexing the AC transmitting device 20 / AC receiving device 60; improves the AC performance (reduced the insertion loss of the AC network, especially the insertion loss after the AC transmitting device 20 and the AC receiving device 60. Under the premise that the output power of the AC transmitting device 20 and the AC receiving device 60 is certain, the insertion loss requirements of the latter AC coupler 70 and the combining network can be reduced.

[0036] Reference Figures 1 to 3 In one embodiment, the first switching device 30 is used to respond to the uplink calibration instruction, connect the AC transmitting device 30 with the AC power splitter / combiner network 40 through the first switching end, and during the uplink calibration, the uplink calibration sequence sent by the transmitting link is transmitted to the AC power splitter / combiner network 40 via the first power splitter / combiner module 10, the AC transmitting device 20, and the first switching device 30, and is coupled to the receiving link through the coupler 70;

[0037] The first switching device 30 is also used to respond to the downlink calibration instruction, and connect the AC power splitter / combiner network 40 and the AC receiving device 60 through the second switching end. During the downlink calibration, the downlink calibration sequence sent by each of the transmitting links is coupled to the AC power splitter / combiner network 40 through the coupler 70, and is transmitted to the receiving link through the AC power splitter / combiner network 40, the first switching device 30, and the AC receiving device 60.

[0038] It can be understood that multiple transmission links and multiple receiving links are provided in the AC calibration link, for example, it can be set to 16, 32, 64, etc. During the uplink calibration, one of the multiple transmission links can be selected to send the uplink calibration sequence. The uplink calibration sequence sent by the transmission link is processed by the first power splitter / combiner module 10 and the AC transmission device 20, and then switched to the AC power splitter / combiner network 40 through the first switching device 30, and then the calibration sequence is coupled to each receiving link through multiple couplers 70. The receiving link collects and analyzes the amplitude and phase differences of different receiving channels and calibrates. During the downlink calibration, multiple transmission links send downlink calibration sequences, and the downlink calibration sequences sent by multiple transmission links are respectively coupled to the AC power splitter / combiner network 40 through the coupler 70, and are switched to the AC receiving link AC_Rx through the first switching device 30, and then processed by the AC receiving device 60, and are switched to the receiving link through the second power splitter / combiner 50 module. The receiving link collects and analyzes the amplitude and phase differences of different transmission channels and calibrates.

[0039] In this embodiment, the first switching device 30 has two signal transmission ends and a common end, one of which is connected to the AC transmitting device 20, the other is connected to the AC receiving device 60, and the common end is connected to the AC power splitter / combiner network. The first switching device 30 can realize the switching of the link, that is, it can control the AC transmitting device 20 to be connected to the AC power splitter / combiner network, or control the AC receiving device 60 to be connected to the AC power splitter / combiner network. During the uplink calibration, the first switching device 30 connects the link between the AC power splitter / combiner network and the AC transmitting device 20, that is, the AC transmitting link AC_Tx. At this time, the uplink calibration sequence sent by the transmitting link is processed by the first power splitter / combiner 10 and the AC transmitting device 20, and then switched to the AC power splitter / combiner network 40 through the first switching device 30. During the downlink calibration, the first switching device 30 connects the link between the AC power splitter / combiner network and the AC receiving device 60, that is, the AC receiving link AC_Rx. At this time, multiple transmission links send downlink calibration sequences, and the downlink calibration sequences sent by multiple transmission links are respectively coupled to the AC power splitter / combiner network 40 through the coupler 70, switched to the AC receiving link AC_Rx through the first switching device 30, and then processed by the AC receiving device 60, and switched to the receiving channel through the power splitter / combiner module.

[0040] Reference Figures 1 to 3In one embodiment, the AC calibration link has a main / backup transmission link and a downlink channel, and the second switching device 100 can realize switching of the uplink calibration sequence and the downlink calibration sequence between the main / backup transmission link and the transmission channel. The AC calibration link has a main / backup receiving link and a receiving channel, and the third switching device 110 can realize switching of the uplink calibration sequence and the downlink calibration sequence between the main / backup receiving link and the receiving channel. When performing uplink AC calibration, the transmission link sends an uplink calibration sequence, and the calibration sequence is switched to multiple groups of downlink channels through the "second switching device 100", processed by the "first power division / combination module" and the "AC transmission device 20", and then switched to the "AC power division / combination network 40" through the "first switching device 30", and switched to the receiving channel through the third switching device 110, so that the coupler 70 couples the calibration sequence to each receiving channel.

[0041] When performing downlink AC calibration, the transmitting link sends a downlink calibration sequence, which is switched to the downlink channel through the "second switching device 100". The downlink calibration sequences output by multiple groups of downlink channels are respectively coupled to the AC power splitter / combiner network 40 through the coupler 70, switched to the AC receiving device 60 through the first switching device 30, and then processed by the AC receiving device 60, and switched to the main / backup receiving link through the second power splitter / combiner module 50 and the third switching device 110".

[0042] Reference Figures 1 to 3 In one embodiment, the number of the transmission chain is at least one, and each transmission chain includes a sequence transmission device 80 and a second switching device 100:

[0043] The sequence transmitting device 80 is used to transmit an uplink calibration sequence in response to an uplink calibration, and to transmit a downlink calibration sequence in response to a downlink calibration;

[0044] The second switching device 100 is arranged in series between the output end of the sequence transmitting device 80 and the AC transmitting link;

[0045] Wherein, in response to the uplink calibration, only one of the second switching devices 100 is turned on to output one channel of the uplink calibration sequence to the AC transmission link;

[0046] In response to the downlink calibration, each of the second switching devices 100 is turned on to output multiple downlink calibration sequences to the AC power splitter / combiner network.

[0047] The number of the receiving links is at least one, and each of the transmitting links further includes:

[0048] A third switching device 110, wherein an input end of the third switching device 110 is connected to an output end of the AC receiving link;

[0049] A sequence receiving device 90, wherein an input end of the sequence receiving device 90 is connected to an output end of the third switching device 110;

[0050] In response to the uplink calibration, each of the third switching devices 110 is turned on to receive the AC power divider /

[0051] Combine the uplink calibration sequence sent by the network, and send the uplink calibration sequence to the sequence receiving device 90;

[0052] In response to the downlink calibration, only one of the third switching devices 110 is turned on to receive the downlink calibration sequence sent by the AC receiving link and send the downlink calibration sequence to the sequence receiving device 90 .

[0053] In this embodiment, the number of transmission chains can be selected to be multiple, and correspondingly, the number of second switching devices 100 and sequence receiving devices 90 can also be set to multiple. The number of receiving chains can be selected to be multiple, and correspondingly, the number of third switching devices 110 and sequence receiving devices 90 can also be set to multiple.

[0054] During the uplink calibration, a corresponding one of the plurality of second switching devices 100 is turned on, the sequence transmitting device 80 outputs the uplink calibration sequence to the first power division / coupling module 10 of the AC transmitting link AC_Tx, and each of the third switching devices 110 is turned on to output the uplink calibration sequence received by the AC receiving device 60 in the AC receiving link AC_Rx and output it to the sequence receiving device 90;

[0055] During the downlink calibration, each of the second switching devices 100 is turned on, and the sequence transmitting device 80 outputs the downlink calibration sequence to the first power division / coupling module 10 of the AC transmitting link AC_Tx; a corresponding one of the plurality of third switching devices 110 is turned on to output the uplink calibration sequence received by the AC receiving link AC_Rx to the sequence receiving device 90.

[0056] It is understandable that, in actual application, the number of second switching devices 100 and third switching devices 110 that need to be turned on can be determined according to whether it is during uplink calibration or downlink calibration. In this way, when performing uplink AC calibration, any second switching device 100 among the plurality of second switching devices 100 is turned on, and each second switching device 100 among the plurality of third switching devices 110 is turned on. When the transmission link sends an uplink calibration sequence, the calibration sequence is switched to multiple groups of downlink channels through the switched-on second switching device 100, processed by the first power splitter / combiner module and the AC transmitting device 20, and then switched to the AC power splitter / combiner network 40 through the first switching device 30, and switched to the receiving channel through each switched-on third switching device 110, so that the coupler 70 couples the calibration sequence to each receiving channel. When performing downlink AC calibration, each of the multiple second switching devices 100 is turned on, and controls any one of the multiple third switching devices 110 to be turned on. When the transmission link sends a downlink calibration sequence, the calibration sequence is switched to the downlink channel through each turned-on second switching device 100. The downlink calibration sequences output by the multiple groups of downlink channels are respectively coupled to the AC power splitter / combiner network 40 through the coupler 70, switched to the AC receiving link AC_Rx through the first switching device 30, and then processed by the AC receiving device 60, and switched to the main / backup receiving link through the second power splitter / combiner module 50 and the third switching device 110.

[0057] Reference Figures 1 to 3 In one embodiment, the AC transmission link AC_Tx includes a main AC transmission link main AC_Tx and a backup AC transmission link backup AC_Tx;

[0058] The AC receiving link AC_Rx includes a main AC receiving link main AC_Rx and a backup AC receiving link backup AC_Rx.

[0059] In this embodiment, when the AC calibration link is applied to the communication equipment and in normal operation, the RF signal can be transmitted only through the main AC transmission link Main AC_Tx and the main AC receiving link Main AC_Rx. When the data transmission fails, the switching device can be switched to the backup AC transmission link Backup AC_Tx and the backup AC receiving link Backup AC_Rx to transmit data. When performing uplink AC calibration and downlink AC calibration, the main / backup AC transmission link Backup AC_Tx and the main / backup AC receiving link Backup AC_Rx can be selected according to the actual calibration requirements to complete the calibration work. For example, when performing uplink AC calibration, the uplink calibration sequence can be transmitted to the first switching device 30 through any one of the main AC transmission link Main AC_Tx and the backup AC transmission link Backup AC_Tx. When performing downlink AC calibration, the downlink calibration sequence output from the first switching device 30 can be received through any one of the main AC receiving link Main AC_Rx and the backup AC receiving link Backup AC_Rx.

[0060] It can be understood that the first switching device 30, the second switching device 100 and the third switching device 110 can be selected as radio frequency switches, through which the conduction and switching of the corresponding links can be achieved. Of course, in other embodiments, the first switching device 30, the second switching device 100 and the third switching device 110 can also be implemented by other devices that can achieve conduction and switching, such as a switching circuit composed of a MOS tube, etc., which is not limited here.

[0061] Reference Figures 1 to 3 In one embodiment, the AC calibration link further comprises:

[0062] A signal processor (not shown), which is connected to the sequence receiving device 90, and is used to perform signal processing on the uplink calibration sequence and the downlink calibration sequence received by the sequence receiving device 90, so as to calculate the amplitude and phase difference of each transmitting channel during the uplink calibration and calibrate it; and to calculate the amplitude and phase difference of each receiving channel during the downlink calibration and calibrate it.

[0063] In this embodiment, when performing uplink calibration, the signal processor can calculate the amplitude and phase response of each receiving channel according to the uplink calibration sequence received by the receiving channel, and then calculate the compensation value of each receiving link according to the difference between the amplitude and phase response of each receiving channel and the reference amplitude and phase response, so as to obtain the amplitude and phase difference of different receiving channels and calibrate. When performing downlink calibration, the signal processor first calculates the amplitude and phase response of each transmitting link according to the signal received by the receiving channel, and then calculates the amplitude and phase difference of different transmitting channels according to the difference between the amplitude and phase response of each receiving link and the reference amplitude and phase response, so as to obtain the amplitude and phase difference of different transmitting channels and calibrate.

[0064] The present application also proposes a communication device, wherein the communication device comprises the AC calibration link as described above.

[0065] The detailed structure of the AC calibration link can be referred to the above-mentioned embodiment and will not be described in detail here; it can be understood that since the above-mentioned AC calibration link is used in the communication device of the present application, the embodiment of the communication device of the present application includes all the technical solutions of all the embodiments of the above-mentioned AC calibration link, and the technical effects achieved are also exactly the same, which will not be described in detail here.

[0066] The above descriptions are only optional embodiments of the present application, and do not limit the scope of application of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the application concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. An AC calibration link, characterized in that: The AC calibration link includes: An AC transmission link, wherein an input end of the AC transmission link is connected to the transmission link; A first switching device, wherein a first switching end of the first switching device is connected to an output end of the AC transmission link, and a common end of the first switching device is connected to an AC power splitting / combining network; An AC receiving link, wherein an input end of the AC receiving link is connected to the second switching end of the first switching device, and an output end of the AC receiving link is connected to a receiving link.

2. The AC calibration link according to claim 1, wherein: The AC transmission chain includes: A first power splitter / combiner module, wherein an input end of the first power splitter / combiner module is connected to the transmission link, and the first power splitter / combiner module is used to receive an uplink calibration sequence sent by the transmission link and send the uplink calibration sequence; An AC transmitting device, the input end of which is connected to the output end of the first power splitter / combiner module, and the AC transmitting device is used to process the uplink calibration sequence and send the processed uplink calibration sequence to the first switching device.

3. The AC calibration link according to claim 2, wherein: The first switching device is used for connecting the AC transmitting device with the AC power dividing / combining network via the first switching end in response to an uplink calibration instruction.

4. The AC calibration link according to claim 1, wherein: The AC receiving link includes: an AC receiving device, wherein an input end of the AC receiving device is connected to the first switching device, the AC receiving device receives a downlink calibration sequence output by the first switching device, and processes the downlink calibration sequence, wherein the downlink calibration sequence is sent to the first switching device by the AC power splitting / combining network; A second power splitter / combiner module, wherein the input end of the second power splitter / combiner module is connected to the output end of the AC receiving device, the output end of the second power splitter / combiner module is connected to the receiving link, and the second power splitter / combiner module is used to receive the downlink calibration sequence processed by the AC receiving device and send the downlink calibration sequence to the receiving link.

5. The AC calibration link according to claim 4, characterized in that The first switching device is used for connecting the AC power splitting / combining network with the AC receiving device through the second switching end in response to a downlink calibration instruction.

6. The AC calibration link of claim 1, wherein: The number of the transmission links is at least one, and each transmission link includes a sequence transmission device and a second switching device: The sequence transmitting device is used to transmit an uplink calibration sequence in response to an uplink calibration, and to transmit a downlink calibration sequence in response to a downlink calibration; The second switching device is arranged in series between the output end of the sequence transmitting device and the AC transmitting link; Wherein, in response to the uplink calibration, only one of the second switching devices is turned on to output one channel of the uplink calibration sequence to the AC transmission link; In response to the downlink calibration, each of the second switching devices is turned on to output multiple downlink calibration sequences to the AC power splitter / combiner network.

7. The AC calibration link of claim 1, wherein: The number of the receiving links is at least one, and each of the transmitting links includes: a third switching device, wherein an input end of the third switching device is connected to an output end of the AC receiving link; A sequence receiving device, wherein an input end of the sequence receiving device is connected to an output end of the third switching device; In response to the uplink calibration, each of the third switching devices is turned on to receive the uplink calibration sequence sent by the AC power splitter / combiner network, and send the uplink calibration sequence to the sequence receiving device; In response to the downlink calibration, only one of the third switching devices is turned on to receive the downlink calibration sequence sent by the AC receiving link and send the downlink calibration sequence to the sequence receiving device.

8. The AC calibration link according to any one of claims 1 to 7, characterized in that: The AC calibration link further comprises: The coupler is used to couple the downlink calibration sequence sent by the transmitting link to the AC power splitter / combiner network in response to downlink calibration, or to send the uplink calibration sequence received by the AC power splitter / combiner network to each of the receiving links in response to uplink calibration.

9. The AC calibration link according to any one of claims 1 to 7, characterized in that: The first switching device is a radio frequency switch.

10. A communication device, characterized in that: The communication device comprises an AC calibration link as claimed in any one of claims 1-9.

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